One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,6)(3,7,8,4)(10,14)(11,17)(16,21)(18,23)(25,26,31,30)(27,34,33,29)(28,32,36,38)(35,40,39,37)(2,6)(3,8)(9,10,13,14)(11,15,17,20)(12,16,19,21)(18,22,23,24)(28,36)(32,38)(35,39)(37,40)(2,6)(4,7)(9,10)(11,15)(12,16)(13,14)(17,20)(18,22)(19,21)(23,24)(25,27)(26,29)(28,35)(30,34)(31,33)(32,37)(36,39)(38,40) involution — undirected(1,3)(2,4)(5,8)(6,7)(9,10)(11,15)(12,16)(13,14)(17,20)(18,22)(19,21)(23,24)(25,28,31,36)(26,32,30,38)(27,35,33,39)(29,37,34,40)(1,3)(2,4)(5,8)(6,7)(9,11,13,17)(10,15,14,20)(12,18,19,23)(16,22,21,24)(25,29,31,34)(26,33,30,27)(28,37,36,40)(32,39,38,35)(1,4)(2,3)(5,7)(6,8)(9,12,13,19)(10,16,14,21)(11,18,17,23)(15,22,20,24)(25,30,31,26)(27,34,33,29)(28,38,36,32)(35,40,39,37)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.